A measurement of the charm and bottom forward-backward asymmetries using D mesons at LEP
G. Alexander,J. Allison,N. Altekamp,K. Ametewee,K. J. Anderson,S. Anderson,S. Arcelli,S. Asai,D. Axen,G. Azuelos,A. H. Ball,E. Barberio,R. J. Barlow,R. Bartoldus,J. R. Batley,J. Bechtluft,C. Beeston,T. Behnke,A. N. Bell,K. W. Bell,G. Bella,S. Bentvelsen,P. Berlich,S. Bethke,O. Biebel,V. Blobel,I. J. Bloodworth,J. E. Bloomer,M. Bobinski,P. Bock,H. M. Bosch,M. Boutemeur,B. T. Bouwens,S. Braibant,R. M. Brown,H. J. Burckhart,C. Burgard,R. Bürgin,P. Capiluppi,R. K. Carnegie,A. A. Carter,J. R. Carter,C. Y. Chang,C. Charlesworth,D. G. Charlton,D. Chrisman,S. L. Chu,P. E. L. Clarke,I. Cohen,J. E. Conboy,O. C. Cooke,M. Cuffiani,S. Dado,C. Dallapiccola,G. M. Dallavalle,S. De Jong,L. A. del Pozo,K. Desch,M. S. Dixit,E. Couto e do Silva,M. Doucet,E. Duchovni,G. Duckeck,I. P. Duerdoth,J. E. G. Edwards,P. G. Estabrooks,H. G. Evans,M. Evans,F. Fabbri,P. Fath,F. Fiedler,M. Fierro,H. M. Fischer,R. Folman,D. G. Fong,M. Foucher,A. Fürtjes,P. Gagnon,A. Gaidot,J. W. Gary,J. Gascon,S. M. Gascon-Shotkin,N. I. Geddes,C. Geich-Gimbel,F. X. Gentit,T. Geralis,G. Giacomelli,P. Giacomelli,R. Giacomelli,V. Gibson,W. R. Gibson,D. M. Gingrich,D. Glenzinski,J. Goldberg,M. J. Goodrick,W. Gorn,C. Grandi,E. Gross,M. Gruwé,C. Hajdu,G. G. Hanson,M. Hansroul,M. Hapke,C. K. Hargrove,P. A. Hart,C. Hartmann,M. Hauschild,C. M. Hawkes,R. Hawkings,R. J. Hemingway,G. Herten,R. D. Heuer,M. D. Hildreth,J. C. Hill,S. J. Hillier,T. Hilse,P. R. Hobson,R. J. Homer,A. K. Honma,D. Horváth,R. Howard,R. E. Hughes-Jones,D. E. Hutchcroft,P. Igo-Kemenes,D. C. Imrie,M. R. Ingram,K. Ishii,A. Jawahery,P. W. Jeffreys,H. Jeremie,M. Jimack,A. Joly,C. R. Jones,G. Jones,M. Jones,R. W. L. Jones,U. Jost,P. Jovanovic,T. R. Junk,D. Karlen,K. Kawagoe,T. Kawamoto,R. K. Keeler,R. G. Kellogg,B. W. Kennedy,B. J. King,J. Kirk,S. Kluth,T. Kobayashi,M. Kobel,D. S. Koetke,T. P. Kokott,M. Kolrep,S. Komamiya,R. Kowalewski,T. Kress,P. Krieger,J. von Krogh,P. Kyberd,G. D. Lafferty,H. Lafoux,R. Lahmann,W. P. Lai,D. Lanske,J. Lauber,S. R. Lautenschlager,J. G. Layter,D. Lazic,A. M. Lee,E. Lefebvre,D. Lellouch,J. Letts,L. Levinson,C. Lewis,S. L. Lloyd,F. K. Loebinger,G. D. Long,M. J. Losty,J. Ludwig,A. Malik,M. Mannelli,S. Marcellini,C. Markus,A. J. Martin,J. P. Martin,G. Martinez,T. Mashimo,W. Matthews,P. Mättig,W. J. McDonald,J. McKenna,E. A. Mckigney,T. J. McMahon,A. I. McNab,R. A. McPherson,F. Meijers,S. Menke,F. S. Merritt,H. Mes,J. Meyer,A. Michelini,G. Mikenberg,D. J. Miller,R. Mir,W. Mohr,A. Montanari,T. Mori,M. Morii,U. Müller,K. Nagai,I. Nakamura,H. A. Neal,B. Nellen,B. Nijjhar,R. Nisius,S. W. O’Neale,F. G. Oakham,F. Odorici,H. O. Ogren,T. Omori,M. J. Oreglia,S. Orito,J. Pálinkás,G. Pásztor,J. R. Pater,G. N. Patrick,J. Patt,M. J. Pearce,S. Petzold,P. Pfeifenschneider,J. E. Pilcher,J. Pinfold,D. E. Plane,P. Poffenberger,B. Poli,A. Posthaus,H. Przysiezniak,D. L. Rees,D. Rigby,S. A. Robins,N. Rodning,J. M. Roney,A. Rooke,E. Ros,A. M. Rossi,M. Rosvick,P. Routenburg,Y. Rozen,K. Runge,O. Runolfsson,U. Ruppel,D. R. Rust,R. Rylko,K. Sachs,E. K. G. Sarkisyan,M. Sasaki,C. Sbarra,A. D. Schaile,O. Schaile,F. Scharf,P. Scharff-Hansen,P. Schenk,B. Schmitt,S. Schmitt,M. Schröder,H. C. Schultz-Coulon,M. Schulz,M. Schumacher,P. Schütz,W. G. Scott,T. G. Shears,B. C. Shen,C. H. Shepherd-Themistocleous,P. Sherwood,G. P. Siroli,A. Sittler,A. Skillman,A. Skuja,A. M. Smith,T. J. Smith,G. A. Snow,R. Sobie,S. Söldner-Rembold,R. W. Springer,M. Sproston,A. Stahl,M. Starks,M. Steiert,K. Stephens,J. Steuerer,B. Stockhausen,D. Strom,F. Strumia,P. Szymanski,R. Tafirout,S. D. Talbot,S. Tanaka,P. Taras,S. Tarem,M. Tecchio,M. Thiergen,M. A. Thomson,E. von Törne,S. Towers,T. Tsukamoto,E. Tsur,A. S. Turcot,M. F. Turner-Watson,P. Utzat,R. Van Kooten,G. Vasseur,M. Verzocchi,P. Vikas,M. Vincter,E. H. Vokurka,F. Wäckerle,A. Wagner,C. P. Ward,D. R. Ward,J. J. Ward,P. M. Watkins,A. T. Watson,N. K. Watson,P. Weber,P. S. Wells,N. Wermes,J. S. White,B. Wilkens,G. W. Wilson,J. A. Wilson,G. Wolf,S. Wotton,T. R. Wyatt,S. Yamashita,G. Yekutieli,V. Zacek
Zeitschrift für Physik C Particles and Fields（2014）
引用21|浏览41
暂无评分
摘要
measurement of the charm and bottom forward-backward asymmetry in e + e − annihilations is presented at energies on and around the peak of the Z 0 resonance. Decays of the Z 0 into charm and bottom quarks are tagged using D mesons identified in about 4 million hadronic decays of the Z 0 boson recorded with the OPAL detector at LEP between 1990 and 1995. Approximately 33000 D mesons are tagged in seven different decay modes. From these the charm and bottom asymmetries are measured in three energy ranges around the Z 0 peak: A_ FB^ c=0.039± 0.051± 0.009 A_ FB^ c=0.063± 0.012± 0.006 A_ FB^ c=0.158± 0.041± 0.011 A_ FB^ b=0.086± 0.108± 0.029 A_ FB^ b=0.094± 0.027± 0.022 A_ FB^ b=0.021± 0.090± 0.026 ⟨ E_cm⟩ =89.45 GeV⟨ E_cm⟩ =91.22 GeV⟨ E_cm⟩ =93.00 GeV The results are in agreement with the predictions of the standard model and other measurements at LEP.
